Notching device



E. M. KEY.

NOTCHING'DEVICE.A APPLICATION man 1AN.23, w18.

Patented Aug. 16, 1921.

3 SHEETS-SHEET l.

E. M. KEY.

NOTCHING DEVICE.

APPLICATION Flu-:D mLza. 191e.

1,387,851. Patented Aug. 16, 1921.

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E. M. KEY.

NOTCHING DEVICE.

, APPLICATION FILED IAN.23, 191s.

Patented Aug. 16, 1921.

3 SHEETS-SHEET 3- 415 Ywwyboz EMM/577' /Yl E' Y GttofmwgvlJNiTi-:Dgsr'raias PATENT y o EMMETT M. KEY, TULSA, OKLAHOMA.

- FICE.

NOTCHING- DEVICE.

an `operator to conveniently cut notches inl the ceiling joists of abuilding for receiving electric conduit pipes, gas pipes, or waterpipes, while standing upon the floor or a building.

`Another object oi' tliisiiivention is theL production of an efficientnotching device which will etliciently grip the joist ofaV building, andpermit the cuttin into the under :tace of the joist.

With vthese and other objects in view, this invention consists ofcertain novel constructions, combinations7 and arrangements of parts aswill be hereinafter fully described and claimed.

In the drawings fr n Figure 1 is a side elevation of the notchingdevice, y

Fig. 2 is an edge elevation ofthe notching device, j A

e Fig. 3 is a side elevation of the'upper end of the notching device,the joist gripping jaws being shown drawn close together,

Fig. l is a top plan view of the notching device,

Fig. 5 is a longitudinal sectional View through the notching frame,

Fig. 6 is an enlarged top plan view of one g saw to cut l. end of thenotching frame, y

Fig. 7 is an enlarged longitudinal sec tional view through Vthevnotching frame taken on line 7 7 of Fig. 5,

Fig. 8 is a section taken on line 88`ofv Fig. 3, the saw beingeliminated therefrom, Fig. 9 is'adetail Vfragmentary perspective view ofoney of the spring pressed shoes adapted to support the notching frame.

Fig. 10 is a section taken on line'10--1O Aof Fig. 1,.

Fig. 11 is a vertical central section through the ejector table showingthe ejector arms connected thereto, j

Fig'. 12 is'a vertical section through yone of the ejector arms,

- Fig.'13 is a kperspective View ofV one o1" Specification of LettersPatent.

Patented Aug. 16", k1921.

Application filed January 23, 191s. serial No. 213,406. c

the gripping jaws, the supporting link arms being broken away,

Fig. 14 is a transverse sectional view through one end of the sawcarrying frame, showing the worm screw and gear coperating with thekadjustingV plate'for shifting the vsaw blades, and

Fig. 15 is a side elevation of one end of the saw carrying `frame.showingja slot formed in the adjusting plate,`within which works thelower end of the pin carrying the saw engaging hinges. l

y referring to the drawings, it will be seen that 1 designates thesupporting standard, which carries a head 2iat its upper end. This head2 is bifurcated at its upper end and the link arms 43'are pivotallymounted within the bifurcated portion of the head 2,

,upon a pivot `pin 1. Each linki arm 3, is provided withr a laterallyextending portion 5 which terminates in an upwardly inclined end 6. Eachlink arm 3 is also provided i with a downwardly inclined body portion 7,which body portion is provided with a "lon. gitudinally extending slot8. The vslot 8 in each link arm 3 extends at an angle of ap# proximately450 to the vertical axis ofthe" link arm 3 and each link arm 3 is'alsoprovided with a projecting ear 8 which extends atright angles to thelongitudinal axis Aor the body portion 7. K A g .The link` arms 3 areplaced in crossed .relation as shown in Fig. rand a pin 9 passes throughthe slots 8 of the link arms 3, and through the guideslots 10 formed inthe head2. This pin 9 is carried by an operat! ing rod 11 whichoperating rod 11 passes longitudinally through the standard 1. The rody11 is secured at .its lower end vto the pin 12, the pin 12 passingthrough the slot 13 formed near the lower end of the standard 1, and thearc-shaped slot 14 formed,V inthe operatingyhandle 15, and working insaid slots. Thehandle 15 `is pivtally secured to Said standard orfcenter thereby causing the slot 14 to act as an eccentric channel lasthe handle 15 isswung and consequently moving the rod *11 longitudinallyof the standard as the handle 15 is thus swung. n

Joist grippingjaws 18 are carried by the link arms 3, and are providedwith verti-y iio link arms 3 arranged in crossed relation, it

Y with a rolled portion at each end thereof,

this rolled portion 25 fitting within the notched or cut-away portion24. Pins 24 i extend through these rolled portions 25 as shown clearlyin Fig. 5 of the drawings and in this way lirmly anchor the casings 23in engagcmentywith the gripping jaws 18. Springs'26 are carried withinthe lower ends of the casings 23 as shown clearly in l? ig. 5 of thedrawings, and these springs 26 support the lugs 27, these lugs 27`projecting out flush with the sides ot' the casings 23 and being capableof moving upwardly and downwardly within the casings to permit the sawcarrying frame to be adjusted relative to the gripping aws 18.

The saw carrying frame 29 is provided with a top plate 30 and a bottomplate 31 upon each side thereoi' which are secured together by means ofside ribs 32. The opposite plates 30 and 31 are spaced to provide a slot34, through which the gripping jaws 18 pass, for enga-ging a joist uponwhich the notchingdevice is adapted to operate. The upper and lowerplates 30 and 31 project inwardly from the side ribs-32 as shown clearlyin Fig. 8 of the drawings for producing tracks upon which the shoulderportions-28 of the lugs 27 are adapted to slide.

A pair of parallel arms are secured to the shoulder portions 28 of eachlug 27 and these lugs are adapted to travel within the tracks formed bythe plates 39 and 31 as shown in Fig. 8 and as previously explained. y

The arms 35 projecting from the lugs 2T of'one grip sing jaw 18 overlapthe arms 35 of the lugs 27 of the opposite gripping jaw 18 as shown inFig. 5 thereby allowing the gripping jaws 18 te be freely moved towardtle pin 40 as shown clearly in Figs. 4 and or awav from each other bythe operation ol' 6 ot the drawings. A saw blade 41 is connected to therespective saw carrying hinges 38, which are mounted near the ends ofthe frame 29j, thereby holding the saw blades 41 in parallel relation inthe manner shown in Fig. 4 of the drawings.

A gage plate 42 is carried by the top face of the frame 29 and restsupon the top plates 30 and this gage plate 42 as shown in detail in -Fig. 6 is provided with diverging slots 43 formed in the respective endsot' the plate 42. The pintle pins 40 which carry the hinges 38 extenddown into these slots 43 as indicated in Fig. 5 ot the drawings. Theplate 42 is provided with a notch 44 at one end thereof as shown in thedrawings at the right end ot nig. 5 into which notch 44 extends pin orbolt 36 iler constituting a guide for the plate 42. rlhe plate 42 is ofcourse provided with an enlarged aperture 45 extending through the plateand this enA larged aperture 45 communicates with a i'iarrow slot 46,through which slot 46 passes the pin or bolt 36 carried by one end oil:the tramey 29, the slot 46 being located at the opposite end of theplate 42 to the notch 44.

A worm screw 47 is placed within a socket 48 formed in the Jframe 29 andis held therein by means ot a tace plate 49, which rplate 49 isdetachably held in engagement Iwith the trame 29 by means of the screws50. The worm screw 47 meshes with a worm gear 51 "tormedupon the undertace of the plate 42 and it will be seen by considering Figs.y 5, 6.and14 that the plate 42 may be shifted longitudinally of the iframe 29 bythe rotation ot the worm screw 47 within the socket 48.

As the worm screw 47 is rotated tor shiifting the plate 42 the sawblades will be moved apart laterally or drawn together according to thedirection ot rotationot the worm screw 47. This movement olithc sawblades 41 will be caused by the working ot the lower ends oi the pins 40within the slots iormed in the respective end'soi the plate 42. The sawblades 41 may .in this manner be adjusted to cut notches of suitablewidths in the lower edges oi a ceiling joist and the like.

A saw traine shifting arm 52 .is pivotally mounted upon the head 2 at 2and is'provided with a longitudinally extending slot 53 throughwhich'slot 53 passes a bolt 54, carried by the Ytrame 29 and is adaptedto permit the frame 29 to be reciprocated transversely oit' the grippingjaws 18 as the shifting arm 52 is swung upon its pivot 2'.. Y A suitablehandle 55 is secured. to the link 52 for the purpose of swingingthehsame. The opposite side oi" the trame 29 is also engaged by means ofa link 56 which link is supported at its lower end upon a pivot bolt 57When it is desired to operate the notching device, the standard 1 israised to .vertical position and the edges of the saw blades 41 areextended transversely across the lower edge of a joist. The standard111s then forced upwardly for causing the gripping a jaws 18 to extendabove the. upper edges of the saw blades 41l and above the lowerj edgebeen raised toa sufficient distance above the upper edges of the blades41, the operating handle 15 is swung downwardly, thereby causing the pin9 to travel downwardly through the slots 8 formed in the link arms 3,'asshown clearly in Fig. 5 of the drawings.

The biting teeth 22 of the gripping jaws 18 will consequently be'forced'. toward each other and will eiiiciently bite or dig into the joist and therebyeliciently and rigidly sup- .port 'orsuspend the.notching devices upon the joist in aposition ready Vfor operation.`

After the notching device has been firmly secured to the joist, the sawblades 41 may be reciprocated across the lower edge of the Y joist forcutting the same, this reciprocating movement being accomplished throughthe swinging of the handle 55. The springs 2G carried within the Vframes23 will'yield-Y ably force the saw blades 41into firm engagement withthe joist. byV forcing upwardly upon the-lugs 27l and .thereby permitthe blades 41't0v efiicien'tly cut into the j oist.

. Fromflth'e foregoing description, it will `be seen that a very simpleand efficient device has been produced for cutting notches in the loweredge' of a ceiling joist, whereby the operatormay stand upon the floorof the building andconveniently operate the'notch'- ing device for thepurpose desired notches in the joist.

It should be understood v that certain obvious detail .mechanicalchanges may be made in the present device without departing from thespirit of'theinvention, so long i asthese. changes fall within the scopeof the appended claims. An ejector isy provided for use `in connection.with the present invention for facilitating the ejectmentof the blockor chunk from between the jaws 18 after the joist has been cut by meansof the saw blades 41, and this ejector comprises anejector table 58whichk is supported upon v the telescoping arms or tubes 60, leachtelescoping arm or tube 60 comprising an upper hollow tubular sectionwithin which works the lower rod section 61, these rod sections 61engaging the springs 62 mounted within the tubular upper sections of thearms 60. These springs 62 are adapted to normally urge the table 58upwardly. The table 58 is adapted to en-` away from the joist byswinging'the handle 1 from side to side upon the joist, the table v.offorming theA 18 apart, the springs 62 however will force the chunk ofwood or block engaged by the table 58 out from between the jaws 18therebyv freeing the notching device from the blockwhich has been cut.The arms 60 are pivotally secured to the depending flanges 59v of thetable58 as shown in Fig. 5 of the drawings, and at their lower ends tothe link arms 3 by Vmeans of pins 63. It is of course understoodthat-the present devicemay be employed for cutting notches in the topyof the joist in the same manner as described above, merely by reversingthe position of the notching device and causing. the saws 41 to hangbelow the standard'l. f

What is claimed isz- 1. kA notching device of the class describedcomprising a saw carrying frame, said saw carrying frame provided withtrack grooves formed therein, gripping jaws carried by said frame, lugsslidably mounted upon said `grippir'ig jaws, means formed lupon said inga support for saidsprings and lugs car.

ried by said jaws.

. 3. A- notching device vof the class described, comprisingca sawcarrying frame, gripping jaws extending through said saw carrying frame,said gripping jaws provided with verticallyk extending slots, operatinglinks pivotally connected together and interposed between saidgrippingjaws, each link provided with pins working in said slots, eachlink being connected at its respective ends to the opposite jaws, andmeans for swinging said links and causing said jaws to movewith respectto each other.

4. A notching device of the class described Vcomprising a saw carryingframe, a plurality of gripping jaws extending through said saw carryingframe, said saw carrying frame provided with track ways, formedtherein,v a supporting lug carried by each jaw, yieldable meanssupporting said lugs, each lug provided with inwardly projecting arms,the

arms of one lug overlapping the arms oi'V the opposite lug, and saidarms working within said track ways, for constituting a guide for saidgripping jaws.

5. A notching device oi the class described comprising a saw carryingframe, a pivot screw supported upon each end of said saw4 saw bladeswith respect to each other, and

means for reciprocating' said saw carrying frame upon said support. V

7. A Vnotching device oit the class described comprising a saw carryingframe, supporting means for said frame, pivot pins carried by said sawcarrying frame, a gage plate mounted upon said saw carrying frame, ahinge mounted upon each pivot pin, saw blades carried by saidn hinges,means for moving said gage plate upon said supporting traine, and meanscarried by said saw blades and engagingV said gage plate for shiftingsaid saw blades with respect to each other as said gage plate is movedlongitudinally upon said saw carrying frame.v l 8. Anotchingy device ofthe class vdescribed comprising a saw carrying frame, supporting meansor'said saw carrying frame, a plurality of saw blades carried by saidframe, a gage plate'carried by said frame, and engaging said saw bladesfor shifting the same laterally as said plate is moved longitudinallyupon said saw carrying frame, a worm gear vformed upon the under face ofsaid gage plate, and a worm screw engaging said worm gear for shiftingsaid gage plate upon said saw carrying frame.

9. A notching device of the class described comprising a saw carryingframe,

supporting means for said saw carrying frame, a plurality of saw bladescarried by said frame, a gage plate carried by said frame, and engagingsaid saw blades for shifting the same laterally as said plate is movedlongitudinally upon said saw carrying frame, a worm gear formed upon theunder face of said gage plate, said gage plate provided with divergingslots arranged near each end thereof, and pins carried by said sawblades and working in said slots, for shifting said saw blades as saidplate is moved longitudinally.

10. A notching device comprising a saw carrying trame, supporting meanstherefor, parallel saws carried by said saw carrying :trame for cuttinga block from the work upon which the device is supported, and a blockejecting means carried by said carrying frame.

, 11. A notchingdevice comprisingaframe, saws carried thereby andadapted to cut a block from the work upon which said device is operated,an ejector table, and spring pressed means for actuating said ejectortable for ejecting a block from between said saws after said notchingdevice has dropped out of engagement with the work.

l2. A notching device comprising a frame, saws carried thereby, joistgripping means carried by said frame, said saws adapted to cut a blockfrom said joist, an ejector table interposed between said saws, springpressed plungers engaging said table and adapted to eject a block frombetween said saws as said notchingdevice drops from engagement with thework, and means connecting said plunger with said joist gripping meansfor spreading said joist gripping means apart.

13. A notching device of the class described vcomprising a frame, aplurality of saws carried thereby, and means located intermediate saidsaws for engaging the work and supporting the saws theron.

In testimony whereof I affix my signature in presence of two witnesses.v

EMMETT M. KEY.

vWitnesses:

J, A. HownRroN, VENA BLACK.

